Key controlled type selection



1950 "r. A. KEEN KEY CONTROLLED TYPE SELECTION 6 Sheets-Sheet 1 Filed April 5. 1945 INVENTOR.

THOMAS A KEEN A TTOR/VEY Oct. 3, 1950 T. A. KEEN KEY CONTROLLED TYPE SELECTION G Sheets-Sheet 4 Filed April 5, 1945 7 I INVENTOR.

rnouns A KEEN- A TTORNEV Oct. 3, 1950 'r. A. KEEN my CONTROLLED TYPE SELECTION 6 Sheets-Sheet 6 Filed April 5, 1945 Patented Oct. 3, 1950 UNITED STATES PATENT OFF-ICE KEY CONTROLLED TYPE SELECTION Thomas A. Keen, San Mateo, Calif., assignor of one-half to Hannah M. Smith, Chicago, Ill.

Application April 5, 1945, Serial No. 586,764

4 Claims. 1

The present invention relates to key controlled type selecting mechanism and particularly to mechanism of the kind which may be used, for example, in ticket printing and issuing mechanisms of the kind in common use for printing and selling tickets representing wagers on entries in a horse race or the like.

The machine which is disclosed in the present application as an illustration of the manner in which the key controlled type selection mechanism of the present invention is employed is substantially the same as that shown in United States Letters Patent No. 2,299,396 which issued to Thomas A. Keen and James Kilburg on October 20, 1942. This machine is one which includes a ticket printing mechanism and key board controlled mechanism for selectively setting the type thereof and for initiating a ticket printing and issuing operation of the machine. The individual keys on the key board are numbered to correspond with the numbers which identify the participants or entries in a race and depression of any one key effects setting of the printing mech anism and operation of the machine to print and issue a ticket bearing the number of thekey depressed. The present application is particularly concerned with the mechanism through which the keys on the key board effect selective operation of the printing mechanism in such a machine though it should be understood that the general construction of the machine itself aside from this mechanism does not constitute a part of the present invention and the description and illustration of the general assembly of the ticket printing machine referred to herein is made for purposes of illustrating the invention which is adaptable to use with other types of ticket printing machines, and in fact to various other kinds of machines wherein control of a type member is accomplished through a key board.

It is the object of the present invention to provide a simple and positively operating means for effecting selection of type to be printed by a type member in response to depression of keys which correspond to multiple type faces on said memher. It is also an object of this invention to provide mechanism wherein such type selection is eiiected by simple mechanical movements and with a minimum of heavy and rapidly moving parts so that selections may be made in quick succession without undue vibration or mechanical stress which result in excessive noise and wear on mechanical parts involved. Further and more specific objects of the invention are made apparent i the following specification wherein reference is made to the accompanying drawings illustrating the invention in a preferred form.

In the drawings:

Fig. 1 is a vertical longitudinal sectional view taken through a ticket printing and issuing machine which includes the type selection mechanism to which the present invention pertains;

Fig. '2 is a similar view taken through another part of the same machine to illustrate certain mechanism not disclosed in Fig. 1;

Fig. 3 is an inverted plan view of a portion of the machine illustrating the main power transmission mechanism and certain phases of the type selection mechanism;

Fig. 4 is a plan View of a printing head which forms a part of the machine;

Fig. 5 is a central vertical section of the same printing head;

Fig. 6 is a view in end elevation of a portion of the type setting mechanism employed in conjunction with the printing head shown in Figs. 4 and 5;

Fig. '7 is an enlarged view of the part of the mechanism illustrated in Fig. 6;

Fig. 8 is a transverse section through the front part of the machine showing in front elevation one row of keys on the key board and the mechanism controlled thereby;

Fig. 9 is an enlarged fragmentary view of the keys and control mechanism shown in Fig. 8 with parts broken away to disclose further details of construction;

Fig. 10 is a plan view on an enlarged scale of a portion of the key controlled type selecting mechanism illustrated in Figs. 2 and 3;

Fig. 11 is a view in side elevation of the mechanism shown in Fig. 10;

Fig. 12 is a perspective view of a portion of the key controlled mechanism illustrating details of construction thereof;

Fig. 13 is a similar view of an alternate form of the same mechanism; and

Fig. 14 is an enlarged view of one of the keys on the key board illustrating in vertical section an electric switch which is actuated upon depression of the key.

Referring first to Figs. 1, 2 and 3, the ticket printing mechanism in connection with which the present invention is to be described is shown as contained in a housing illustrated at 20. A printing headgenerally indicated at 2| is disposed on top of this housing and enclosed by a cover plate 22 which is removable for the purpose of making adjustments to the printing head but normally retained in place by a key controiled locking mechanism 23. The printing head 2| is of a cylindrical type made up of a plurality of multifaced type discs adjustably supported with relation to the shaft which supports the head, as will hereinafter be described in detail. A ticket strip or web of paper upon which tickets are printed is advanced beneath the printing head 2| upon actuation of the machine. As best shown in Fig. 2, the ticket strip enters the housing 20 from a suitably positioned supply roll (not shown) through a slot 25 formed in the bottom of the housing and passes upwardly through guides 25 and then over a feed roller 21 (see also Fig. 3) which feed roller has driving pins 28 for registry with suitably spaced perforations in the ticket strip in order to advance it a ticket length for each ticket printing operation of the machine. After passing over th feed roller 2?, the ticket passes horizontally beneath the printing head 2! so that it may be pressed upwardly against the printing head whereby the impression of selected type is made upon the ticket. A platen 29 supported on an arm 39 is pressed upwardly against the ticket strip to force it against the type characters on the printing head in properly timed relation to the operation of the machine, and after the printing has been accomplished, the strip is advanced by operation of the feed drum 21 and the printed ticket is sheared by a knife 3|. As it is sheared, it is grasped between a pair of ejecting rollers 32 and 33 which advance it out of the housing through a slot 34 provided for that purpose.

The entire operation of the machine is under control of the keys on the key board so that upon depression of any key a type disc on the printing head is ejected to print an entry number corresponding to the number of the key depressed. At the same time a single cycl clutch is conditioned to effect a complete ticket printing and issuing operation and a counter is actuated to register the sale of a ticket on the entry selected. For a general understanding of the mechanism controlled by the key board, reference is again made to Fig. 1 wherein an electric motor 49 is illustrated as the source of power for the ticket printing and issuing mechanism. Through reduction gearing contained in a gear box 4| on the motor, a sprocket 42 is continuously driven to opcrate a chain 43 which passes over an idler sprocket 44 and a driven sprocket 45 which rotates freely on a main shaft 45, also shown in Fig. 3. The driven sprocket 45 is adapted to be connected for driving engagement with the shaft 49 by means of a single cycle clutch contained in a clutch housing 41. This clutch includes a radially extending lug which appears at 48 in Fig. 1 and the hooked end 49 of a lever 50 normally engages behind this lug and prevents engagement of the clutch. Upon raising of th hooked end 49 of the lever to clear the lug 48, the clutch engages and drives the main shaft through a single complete cycle or until the lug 48 again comes into contact with the end of the lever. The lever 50 is pivoted as at and carries a downwardly extending pivoted pawl 52. A spring53 urges the pawl to the left as viewed in Fig. 1 and to a position substantially perpendicular to the lever 50 at which position it stops by reason of a shoulder 53 which engages the bottom of the lever. The pawl thus normally assumes the position illustrated, but is free to swing to the right against the tension of the spring 53a. A solenoid 54 has a retractible armature 55 pivoted to a lever 55 which is in turn pivoted as at 5'! at one end and 4 engages withthe pawl 52 at its opposite end. A spring 58 tends to hold the armature and the lever 56 upwardly in a position limited by a stop tail 59 on the lever. When the solenoid 54 is energized, which occurs upon depression of one of the keys on the key board, its armature is retracted and through the lever 56 and pawl 52 the lever 50 is swung about its pivot 5| to raise its end 49 free of the lug 48. The end of the pawl 52 swings away from the lever 55 during this operation so that a single cycle operation of the clutch is insured even though the operator should fail promptly to release the key which effects energization of the solenoid. The details of construction of the clutch 47 are clearly shown and described in Patent No. 2,299,396 referred to above though other types of single cycle clutches may be used for this purpose. It is sufficient to an understanding of the present invention that the operation of the clutch 47 effects a single complete rotation of the main shaft 46.

There is also as illustrated in Fig. l, a mechanism for effecting sale in rapid succession of a predetermined number of tickets upon a single depression of any key. This mechanism comprises a notched drum 55 adapted to engage a pivoted tail 65 on the lever 59 to retain the lever in its depressed or lowered position. The drum E5 is carried at one end of a shaft 66, the opposite end of which is fitted with a control dial 6'! operable from the exterior of the machine, but a further description of the construction and operation of this mechanism is not essential to an understanding of the present invention.

When the main shaft 49 operates through a single cycle, it drives the ticket feeding drum 21 a distance sufficient to advance the ticket strip the length of one ticket. This is accomplished through a gear 19 on the main shaft, as shown in Fig. 3, which meshes with and drives a set of Geneva gears, shown at 'H, which impart intermittent rotation to a gear 12 which meshes with and drives a gear 73 on the shaft T4 to which the drum 21 is secured. This motion of the ticket strip, of course, takes place after the printing operation and just before the printed ticket is sheared and ejected from the machine.

The same motion of the main drive shaft 46 also operates the platen 29 to press the ticket strip upwardly against the type faces on the printing head. This is accomplished through the mechanism illustrated in Fig. 2 wherein the arm 39 which supports the platen 29 is shown as pivotally supported on a pin 80. A pair of toggle links 8| and 82 are normally disposed in a buckled position as illustrated and form a connection between the platen supporting arm 39 and a fixed bracket 83. The central pivoted connection of the toggle links is connected by a link 84 with an arm 85 which is also pivotally supported by the pin 89. These parts are held in their normal position with the platen lowered as indicated at Fig. 2. by a spring 88. A cam shown in dotted lines at 81 engages the arm 85 upon rotation of the shaft 46 to which the cam is secured and, through the medium of the link 84, urges the toggle links BI and 82 to a straight line position so that the platen 29 forcibly engages the ticket strip above it and presses it into firm contact with the type on the printing head.

Depression of a shear heead which carries the knife 3! is also effected during rotation of the shaft 45. This shear head 99 is supported for rocking movement about the pin 90 and it carries a tail 9| which is engageable by a cam 92 fixed to 5 the shaft 46. Upon rotation of the shaft, this cam engages the tail 9| of the shear head to rock it and cause the knife 3I to cooperate with a hardened steel insert shown at 93 to shear the ticket strip. The idler roll 33 is also carried by the tail of the shear head 90 and upon the rocking movement described this idler presses the sheared ticket upwardly into engagement with the rotating ejector roller 32 so that the sheared ticket is advanced throughthe delivery slot 34. The ejector roller 32 is driven as illustrated in Fig. 1 by a chain 96 driven from a main shaft sprocket and driving a small sprocket 97 on a shaft 98 which also carries a gear 99 meshing with and driving a gear I fixed to a shaft III which also carries the ticket ejecting roller 32.

The details of construction of the printing head 2| are illustrated in Figs. 4 to 7 inclusive. In Figs. 4 and the head is shown as mounted on a shaft IIEi rotatably supported in bearings II I and H2. The shaft carries a plurality of printing discs which may be identified as three date discs H3, and an entry disc I I4, three code discs H5, H5, I I! and a race disc IIB. Intermediate the entry disc II4 and the code disc I I5 is positioned a type member I I9 bearing one number only such as the number 10 shown to indicate the number of the particular machine of a group by which the ticket was printed. All of the discs are normally free of any connection with the shaft I I5 with the exception of the entry disc I I4 which is keyed to the shaft for rotation thereby so that it may be set to print a different entry number for each ticket. The date discs I I3 for example are all rotatably mounted as shown in Fig. 5 on a hub I2I which surrounds the shaft H0 and they are retained against endwise removal from the hub by a knurled nut I22. From day to day the position of the date disc may be adjusted to bring their type faces into position to print the proper date upon actuation of the printing mechanism. The individual date discs are locked in their set position with respect to the stationary hub I2 I by means of a key I23 clamped in place by a screw I24 which passes through a slot I25 in the key. The key I23 carries a pin I26 which is disposed in perforations in the discs which are in registry with each other and with a perforation in the hub member I2I as best shown in Fig. 5. Upon loosening of the screw I24 and retraction of the key, the pin I26 is withdrawn from these perforations to permit rotatable adjustment of the date discs.

The three code discs H5, H6 and Ill, the race disc H8 and the type member II9 are all carried by a tubular support I27 through which the shaft I I0 passes and which is formed with a radially extending annular flange I28 at its outer end. The member I I 9 which prints the machine number is fixed to the type I2 I in any suitable manner and the first two code discs H5 and H6 are locked in their adjusted position by a key I29 fixed to the member H9 by a screw I30. This key is in the form of a small metal tongue adaptedto be disposed within the grooves I3I (Fig. '7) formed between the type faces on the discs. The third code disc I I1 is connected with the race disc H8 in a similar manner by means of a key I32 which is secured to the race disc I I8 by a screw I33 and has a tongue portion extending into one of the slots I3I of the code disc II'I. Hence, when a ticket is printed, it bears the number of a race printed by the race disc and it also bears three code letters or symbols, two of whichare printed by discs I I5 and I ifiand remain the same effect swinging of the lever throughout the day or until manual adjustment of the disc positions has been made. The other code symbol printed by the disc I I1 changes with each race because of its connectionwith the disc which prints the race number. Consequently, the code symbols which appear with each-race number are unknown to the purchaser of a ticket until the time when the race commences andthe fraudulent production of spurious tickets in advance of the race time is therefore impossible. The race number is changed at the start of each race by an-"electric switch usually disposed in the calculating room or .at any other suitable point remote from the machines and not under control of the individual machine operators. The mech anism for changing the race number and its single associated code symbol by an electric impulse is illustrated in Figs. 6 and '7 wherein the race disc I I8 is shown as having secured to its side; as also illustrated in Fig. 5, a ratchet wheel I35 and a notched detent wheel I35. The ratchet wheel I35 is engaged by a spring pressed pawl I31 pivoted to the upper end of a lever I38 which rocks about a central pivot I39. The lower end of the lever I38 is connected by a link I 40 with a retractable armature I4I' operated by a solenoid I42. The solenoid I42 is energized by a circuit which may be closed by operation of a switch at any desired remote location so that upon retraction of its armature, the lever I38 is swung about its central pivotal support and the pawl I37 engages the ratchet I35 to advance it and the race disc to which it is attached one step or a distance corresponding to the spacing between the consecutive numbers on the type faces 01"- the race disc. In order to insure registry of the type faces in their printing position upon each setting of the race disc, a detent pawl I45 which is pivoted to the flange I28 is urged by a spring I46 into one of the notches of the detent wheel I 33. The notches on the wheel I 33 are spaced identically with the teeth of the ratchet I35 and the centers of the type faces on the race disc. The tension of the spring I46 is sufficiently light to permit the detent wheel to rotate upon turning of the race wheel, though it tends to hold the disc in itsproperly centered printing position. In order positively to prevent the detent pawl from over-riding the notch in which it is intended to stop, a pin I4! is provided on the pawl I3! in a position to engage a tail I48 on the detent pawl when the pawl I3"! is in its fully retracted position. The presence of this pin in engagement with the tail of the pawl positively retains it in the proper notch of the detent wheel until the pawl I3! returns to normal position and there is no further tendency for it to override.

The entry disc H4 which is directly connected with the shaft I I 3 must be changed upon the sale of each ticket, and this is effected by rotation of the shaft to bring the type face corresponding to the number of the selected entry to its printing position. To accomplish this gear I55 is secured to the end of the shaft III] and this gear meshes as best shown in Fig. 2 with a rack I5I supported in a guide I52 for horizontal sliding movement. The forward end of the rack I5I is connected by a pin and slot connection I53 with the upper end of a lever I54 which is centrally supported for pivotal movement at I55 and which has its lower end connected by the pin and slot I55 with an arm I 5'11. Upon operation of the machine, the arm I51 moves back and forth ina direction to I54 and consequently reciprocation of therack I5i so that the entry disc is rotated. The degree of rotation of the entry disc and the type face thereon presented for printing is determined by depression of the keys on the key board which are numbered to correspond to the type faces on the entry disc. The mechanism through which this is accomplished is illustrated in Figs. 2, 3, 8, 10 and 11, wherein an elongated guide track or slide I60 is shown as secured to the bottom of the case 20. This slide is rectangular in cross section and open at its top, and in its rear portion carries a slide block I6I to which is secured an upstanding rack I62 which, as best illustrated in Fig. 2, meshes with the gear 12 which oscillates upon each machine operation through the medium of the Geneva gears as hereinbefore described. Therefore, upon each operation of the machine, the rack and the sliding member I6! to which it is secured moves forwardly and rearwardly in the slide I60. The sliding member I6I is disposed in the rear end of the slide I60 and in its forward end is a control bar [64 which is rectangular in cross section at its forward portionand cylindrical toward its rear. The rear portion of the control bar I64 extends through an opening in the front end of the member I6I, as indicated at I65 in Fig, 10. A compression spring I66 is interposed between the forward end of member I6I, and a collar I61 on the control bar I64 so that upon forward movement of the member I6I, the bar I64 tends to move forwardly the same distance. The forward movement of the control bar may be interrupted at any point and the difference in movement of the two parts is absorbed by the spring I66. The arm I51 which operates the lever I54 is connected to the rear end of the member I64 as by screws I68 as shown in Figs. 10 and 11 so that the exact distance of the forward movement of the control bar I04 is translated into a corresponding movement of the rack II which rotates the entry disc H4 of the printing head. In order to limit this forward movement of the member I64 to correspond with the particular key depressed on the key board, it is provided with recesses on its opposite sides to provide. a shoulder I which functions in conjunction with keys I, 3 and 5, a shoulder |1I for keys 1, 9 and I I, and a shoulder I12 for keys 2, 4 and 6, while its end I13 functions with keys 8, I0 and I2. The depression of any key causes a stop pin generally indicated at I15 to project through suitably spaced perforations I16 in the sides of the slide I60 for cooperation with one of the shoulders I10, I1I or I12, or the end I13. The stop pins I15 are individually numbered with reference characters from one to twelve inclusive, which will be of assistance in identifying them with the particular keys by which they are operated,- as well as with the entry numerals which appear on the entry disc of the printing head. When any one of the entry keys I11 shown in Figs. 8 and 9 is depressed, a pin I19 on the lower end of its stem I80 engages the horizontal arm I8I of a bell crank lever which is pivoted at I82 and has a vertical arm I83, as also shown in Figs. 9, l2 and 13. When the horizontal arm I8I swings downwardly, a pin I84 at its end engages beneath a latch I85 on a latch bar I86 which is supported on a parallel link I81 to permit it to swing to the left. A spring I88 normally holds the latch bar in its right-hand position. The bell crank is therefore held in its depressed position until another key is depressed to swing the latch bar to the left, thereby releasing the first bell crank engaging its own bell crank in depressed position. The vertical arm I83 of the bell crank is connected with the horizontal arm IBI through a bushing I and a spiral spring I9I disposed about said bushing tends to retain the bell crank in its normal position. The vertical arm I83 is connected with one of the stop pins I15 by a centrally pivoted lever I92, as shown in Fig. 12, or by an end pivoted lever I 93, as shown in Fig. 13. Whether this connection is made by the lever shown at I92 or that shown at I93 depends upon whether the key which operates it is on the left-hand or the right-hand side of the machine as in either case the stop pin I15 must be moved toward the center in order that its end will be projected into the centrally positioned slide I60. The lever I92 as shown in Fig. 12 is supported by a bracket I94 fixed to the bottom plate of the casing 20 and the lever I93 as shown in Figs. 8 and 13 is pivoted at its lower end to a bar I95 secured to the under surface of the bottom of the casing which casing bottom is suitably perforated to permit the levers to extend downwardly to their point of pivotal support. Consequently the depression of any one of the keys from one to twelve effects movement of its corresponding stop pin I15 toward the center of the machine so that its end is projected as illustrated in Fig. 10, in connection with the stop pin II, into the slide I60 in a position to cooperate with its associated shoulder I10, "I, I12 or I13. Thus when the member I64 is moved forwardly it is stopped at a point depending upon the key depressed and, through the arm I51, it moves the lever I54 and rack I5I a distance sufficient to bring the proper numeral on the entry disk to printing position just before the plate 29 presses the ticket strip upwardly against the printing head.

In addition to the keys I11 which are arranged in two rows and numbered from one to twelve there is provided a try key, the purpose of which is to effect the printing of a ticket and test the operation ofthe machine before actual sale of tickets commences, the ticket so printed will be marked with a T instead of the usual entry number, and this trial character occupies the thirteenth position of the entry disk II4. This try key 200 as shown in Fig. 8 has a stem 20I which upon depression of the key engages with a bracket 202 on a vertically guided slide 203 so that a pin 204 becomes engaged beneath one of the latches I85 on the latch bar I86. Operation of the try key 208 does not affect any of the stop pins I15 but permits the control bar I64 to move forwardly to its full limit where it engages with an adjustable stop member in the form of a screw 205 in the forward end of the slide I60 as shown in Figs. 10 and 11 and this movement of the control bar corresponds to the try position of the entry disk on the printing head. The control mechanism in conjunction with the keys one to twelve inclusive comprises two sets of the apparatus shown in Fig. 8, there being one for each row of keys in the key bank, but as they are substantially identical the foregoing description of one will sufllce.

It is required that the sale of each ticket be registered on a counting device corresponding to the particular entry for which the ticket was issued and it is also required that the sale of a ticket on any entry be accompanied by the production of an electric impulse which may be transmitted to totalizing apparatus for the purpose of determining the ratio of sales on any one entry to the total sales so that the odds payable upon a winningentry may readily be calculated. This is accomplished through the mechanism illustrated in Figs. 8, 9, l2 and 13 wherein the vertical arm 183 of each of the key actuated bell cranks is shown as provided with a rear-- wardly extending pin 299. This pin projects into the groove of a collar 209 which is slidably mounted and splined to either of a pair of transversally extending shafts 2M or 25 l. The collar 209 carries an integrally formed earn 212 at one side and directly behind each of the collars 209 in its normal position are a, pair of switches 253 and 2! made up of contact members carried on spring arms 2 l and adapted to be simultaneous 1y closed by engagement with the spring arms of the cam 2122 upon rotation of the shaft 210 or 2| I. In the normal position of the several collars 209 the cams 2l2 are out of alignment with the switches as shown in Fig. 3. Depression of any one of the keys, however, slides the corresponding collar 209 on the shaft to bring the caminto alignment with the switch. A ticket printing operation of the machine then rotates the shafts 21B and 2H and the aligned cam closes the switches 213 and 2M one of which sends an impulse to suitable totalizing mechanism and the other of which closes a circuit to a counter corresponding tothe number of the entry upon which the ticket was issued. Rotation of the shafts 210 and 2!] is eifected through mechanism illustrated in Fig. 3 wherein these shafts are shown as provided with driving gears 219 and 219 respectively, connected by an intermedb ate idler 220. Sprocket 22! also mounted on the shaft 2 I0 is driven by a chain 222 from a sprocket on a stub shaft 223 which has a gear 224 driven through an idler gear 225 by a gear 229 on the main shaft 46. Thus upon each operation of the main shaft the shafts 2H! and 2| l are turned through one complete rotation and whichever cam 2l2 on either of these shafts has been aligned with its corresponding switches by depression of a key will close those switches to send an impulse to the totalizer and to actuate a counter associated with that particular machine. The counters employed for this purpose are of a conventional mechanical type as shown at 245 in Fig. 2 with their reading visible through sight openings 246 suitably positioned in the casing 20. Each counter has an actuating arm 22'! connected as by a chain 228 with the armature 229 of an electromagnet 230 and the electromagnct corresponding to the key depressed is energized to retract its armature and actuate the counter which corresponds to the entry for which a ticket has been issued.

The circuit which energized the solenoid 55 for control of the main clutch must be closed upon depression of any key and this is preferably accomplished by a switch such as that shown in Fig. 14 wherein the stem I80 of the key IT! is shown as extending through a housing 23!. A pair of contact members 232 are arranged within this housing and are bridged by contact members 233 supported by a metallic member 234 which is carried by a laughing 235 fixed to the key stem. A key return spring 236 is also advantageously contained within the housing 23 l.

I claim:

1. Apparatus for selective settin of motor driven printing mechanism responsive to depression of keys on a keyboard which comprises, an elongated channel shaped guide, a control bar slidable in said guide and resiliently urged upon each motor driven printing operation to undergo a full stroke in the guide, means connecting the control bar with the printing mechanism for positionin of type on said mechanism, and means including stop pins operable upon depression of keys on said keyboard to enter said guide and interrupt the stroke of the control bar at points eflecting setting of type correspondin to the key depressed.

2. Apparatus for selective setting of motor driven printing mechanism responsiv to depression of keys on a keyboard which comprises, an elongated channel shaped guide, a control bar slidable in said guide and resiliently urged upon each motor driven printing operation to undergo a full stroke in the guide, means connecting the control bar with the printing mechanism for positionin of type on said mechanism, said control bar having shoulders formed at spaced points intermediate its ends, and means including stop pins operable upon depression of keys on said keyboard to enter said guide and act on said shoulders to interrupt the stroke of said control bar at points efiecting setting of type correspond ing to the key depressed.

3. Apparatus for selective setting of motor driven printing mechanism responsive to depression of keys on a keyboard which comprises, an elongated guide, a bar slidable in said guide and operable through a full reciprocal stroke upon each cycle of the motor driven printing mechanism, a second bar slidable in the guide and connected with the printing mechanism to control setting of type thereon, a resilient connection between said bars whereby the first bar urges the control bar through a full stroke but permits stopping of the control bar at various type setting positions and key controlled stops slidable through the guide to intercept the control bar.

4. Apparatus for selective setting of motor driven printing mechanism responsive to depression of keys on a keyboard which comprises, an elongated guide, a bar slidable in said guide and operable through a full reciprocal stroke upon each cycle of the motor driven printing mechanism, a second bar slidable in the guide and connected with the printing mechanism to control setting of type thereon, and a resilient connection between said bars whereby the first bar urges the control bar through a full stroke but permits stopping of the control bar at various type settin positions and key actuated means for stopping the control bar at said positions.

THOS. A. KEEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,142,079 Cleal June 8, 1915 2,082,282 Garbell June 1, 1937 2,141,577 Watson Dec. 27, 1938 2,150,761 Craig Mar. 14, 1939 2,272,079 Anderson Feb. 3, 1942 2,299,396 Keen 1- Oct. 20, 1942 2,345,212 Nelson 1. Mar. 28, 1944 2,348,789 Crossman May 16, 1944 2,380,257 Pasinski July 10, 1945 2,389,823 Smith Nov. 27, 1945 2,418,027 Gubelmann Mar. 25, 1947 

